Staking machine



April 18, 1950 J. F. AMELUNXEN 2,504,917

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JOHAN F'. AMELUNXEN INVENTOR.

AGENT April 18, 1950 J. F. AMELUNXEN STAKING MACHINE 2 Sheets-Sheet 2 Filed June 2', 1947 sa ,o \\/55 FIGS INVENTOR.

AGENT Patented Apr. 18, 1490 STAKING MACHINE Johan F. Amelunxen, New Castle, Del., assignor to F. F. Slocomb Corporation, Wilmington, Del., a corporation of Delaware Application June 2, 1947, Serial No. 751,895

3 Claims.

This invention relates to leatherworking machines and more particularly to an improved mechanism for staking leathers and leather-like materials.

The art of staking leather has gradually progressed through the years from a manual operation involving heavy manual labor wherein the leather is manually drawn and flexed sharply over a narrow blade to a largely mechanical operation. The mechanical operation has heretofore commonly been performed on a machine in which the leather is sharply flexed over a blade superimposed between two pairs of coacting rotating members, the lower pair of members providing the necessary tension and spreading action to the leather and the upper pair of members acting to draw the leather upwardly over the blade and at the same time withdrawing the leather from the machine. U. S. Patent No. 2,238,413 to Larner Doughty, et al., is illustrative of the relatively recent advances made in the art.

It is an object of this invention to provide a readily adjustable staking machine having improved operating efciency and flexibility.

It is a further object of this invention to provide a staking mechanism in which the gripping power of the drawing rolls may be effectively and conveniently controlled.

It is a further object of this invention to provide a staking machine having improved staking blade adjustment means.

Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claims.

Generally described, this invention includes a frame member, an upper relatively fixed power roll, a spreader roll, a staking blade mounted therebetween, a relatively movable upper power roll and a tension roll mounted on an arm member, mechanism for rotating said power rolls and -said spreader roll, and mechanism for actuating said arm member.

A preferred embodiment of the invention has been chosen for purposes of illustration and description and is shown in the accompanying drawings forming a part of the specification wherein like figures refer to like parts wherever view of the staker blade adjustment means taken along line 3-3 of Fig. 2;

Fig. 4 is an enlarged fragmentary sectional View of the transfer and drive sleeve assembly taken along line 4-4 of Fig. 1.

With reference to the acompanying drawings a frame I0 is shown having mounted thereon a relatively xed power roll II, preferably constructed with a rigid metal core shaft I2 covered with a resilient material I3, such as natural or synthetic rubber, for the entire length of the working face. The core shaft l2 is rotatably supported near the ends by bearing blocks I4 and rotated by driven gear I5 mounted upon an eX- tension of the core shaft I2, said driven gear being in turn rotated by a drive gear (not shown) mounted on a variable speed drive shaft I6 of a variable speed reduction unit I'I. The variable speed reduction unit I'I is driven by an electric motor power unit I8, the rotative power being transmitted from the motor unit to the variable speed reduction unit by a' plurality of V-belts mounted upon their sheaves I9 and 20.

An upper relatively movable power roll 2I and a relatively movable tension roll 22 are rotatably supported near their ends in parallel relationship by bearing pillow blocks 23 mounted upon pivotal arm members 24. The pillow blocks supporting the movable power roll 2| are adapted to be vertically adjustable by means of loosening mounting bolts 25 received in slotted recesses 26 and positioning by the proper setting of the hanger bolts 2'I. The composite construction of the movable power roll and tension roll is preferably similar to the construction of the fixed power roll described hereinabove.

The pivotal arm members 24 are mounted at the lower extremity thereof upon a pivot shaft 28, pivotally supported by a pair of spaced bearings 29 rigidly attached to the base portion of the frame Ill. A drive sleeve assembly 30, illustrated in detail in Fig. 4, is rotatably mounted upon an extremity of pivot shaft 28. Said drive sleeve assembly 30 consists of sleeve 3l rotatable upon the shaft 28, a sprocket 32 rigidly attached to said sleeve, and driven spur gear 33 rigidly attached to said sleeve opposite said sprocket. The drive sleeve assembly is retained on the pivot shaft by a shaft collar 34 in juxtaposition to said sprocket and a safety collar 35 attached to said shaft in juxtaposition to said driven gear 33. Rotativo power to eifect rotation of the movable power roll 2| is transmitted from the sprocket 32 to a movable power roll sprocket 36 by a roller chain 31.

Rotative power supplied by the motor unit I8 to the fixed power roll II is transmitted to the Y movable power roll ZI by a roller chain 38 'connesting a fixed power roll sprocket 39 to a transcontained .by the frame lll. 'speed drive 'shaft 52 with'a drive sprocket 53 ymounted 'thereon of the variable speed-reduction to said shaft Il@ are adapted to retain the bearing sleeve 43 in place. n

The proper tension is maintainable in the roller chains 31 and 38 by pivotally-mounted idler sprockets 41 adapted to be locatedsoas to :bear against the chain in an amount desired by pivotal adjustment of the idler sprocket mountings 48.

A spreader roll t9, of a construction familiar to those skilled in the art, having narrow `blades'5l)` attached thereto to effect helices extending in reversefdirections from the mid-section of the iroll, isrotatably supported near the ends thereof by a pair of floating adjustable bearing blocks A lower constant unit l1 is adapted to rotate the spreader roll by means of a-roller chain drive to the spreader roll .sprocket 5d.

A zstaker knife assembly 55'interposed between Vthe iixedpower roll 2l and the spreader rollllS Yis made up of, with reference to Fig. 3, ablade -member 5S ofa length substantially equal to the lenth ofthe working face of the spreader roll 49, a blade'support bar 51 to which the blade 56 is attached and support barend pivot members 58 adaptedto slidably receive each'end of thesupport bar 51. Apivot-pin 59 is rigidly secured to the frame lll and adapted to permit the pivot members 5S' to pivot freely thereabout. A thread- I adjustment wheel 64, threadedlyattached to said vertical adjustment rod 62, is rotatably mounted in an extended bracket 65 of said frame lll and retained in place therein by a locking collar 66. Rotation of the adjustment wheels 64 willeffect movement of the pivot members 58 about the pivot pins 5S and in turn effect a change in loca'- tion of the staker'blade member'56 with respect Yto the rlower tension roll 22 at the discretion of the operator.

A table 61, preferably made of well-seasoned hardwood, forms a part of the frame I and is of great convenience Yin the productive operation of the invention.

The proper setting of the foot valve 58 by the operator to control the direction of flow of pres- Vsured iiuid to a pivotally-mounted cylinder assembly S9 connected through asystem of connecting linkage to the pivotal arm members 24, effects the movement of said pivotal arm members in the desired direction. A piston rod 10 of the cylinder asembly 69, preferably provided with a `cushioned stop at the end of each direction of stroke, `is pivotally connected to a crank Yarm 1| which is rigidly attached Yto a control shaft 1.2.

- .A :connecting link 13 .is pini-connected at-Zon'e end thereof to a linkage crank 14 and at the other end thereof to an arm adjustment bolt 15 adjustably attached to the arm members 2t. The location of the adjustment bolt 15 may be readily adjusted to effect proper parallel relationship between the power rolls and thereby insure uniform pressure being applied throughout their length of contact. The control shaft 12 is rotatably supported at its ends by bearings 15 mounted on the frame I0.

The foot valve 68 is preferably of a type such -as Lehigh Marton piston-type combination valve with'foot release made by Lehigh Foundries, Lehigh-'Marton Air Control Division, supplied with a :pressured uid'whose pressure may be conveniently controlled by the operator by means oi a pressure control valve (not shown). It can thusbe seen that the pressure of the upper mov- -ablepower roll 2l against the fixed power roll l! caring blocks 5l.

The rotative speed of the power rolls is readily adjusted in a variable speed reduction unit I1 v.such as a positive, infinitely Variable speed trans mission (P. I. V.) made by the Link-Belt Company by rotating afspeed adjustment wheel 19.

lA guard plate 8B is preferably located below the `spreader rollto deflect theends of the hides away'from the under side of the spreader roll. In practice, guards, not shown for the sake of clarity in the drawings, are constructed to enclose the moving Vparts suchas gears, chains, sprockets and rolls as 'muchas possible for maximum protection of the operator. A control switch 8l to start and stop the electric motor i8 is conveniently located Von the frame l0 within easy reach cf the operator.

In operation of the machine of'this invention, the operator adjusts the rolls to the speed desired, manipulates the vfoot valve 5B to effect the movement of the upper movable power roll 2l away from contact with the fixed power roll il, positions a hide to be lsoftened in the space between'the rolls, as illustrated in Fig. 2, and again manipulates the foot valve' to effect pressured AContact between the power rolls which draw the labove operation is repeated to stake the opposite portion of the hide.

This vmachine has .been found to greatly improve the product obtained in the staking operation and its versatility in adaptation to varying production conditions such as the staking of pig, goat, sheep, and calf skins, kips and sides has `beenv outstandingin comparison with prior art constructions.

'What I claim and `'desire to protect by Letters Patent is:

1.In a staking Ymachine the combination of a frame member; an upper relatively fixed power roll; a'spreader roll ipositioned substantially below said fixed power roll 'and mou 'l justable floating bearing blocks; a sts ing supported between said fixed power roll and id spreader roll; substantially vertical adj;v tinent meansfor said staking blade including blade "fsupport bar and pivotal and supports for said ,5 power roll; a relatively movable tension roll; pivotally mounted arm members adapted to support said movable power and tension rolls; means ior rotating said power rolls; means for rotating said spreader roll; and means for pivotally said arm members.

2. In a staking machine, the combination of a frame member; an upper relatively fixed power roll; a spreader roll positioned substantially below said xed power roll and mounted in adjustable iloating bearings blocks; a staking blade supportedbetween said ixed power roll and said spreader roll; substantially vertical adjustment means for said staking blade including a blade support bar, pivotal end supports for said bar, an adjustment bar rigidly attached to said pivotal end supports at one end and .pinned to a threaded vertical adjustment rod at the other end, and an adjustment wheel threadedly attached to said vertical adjustment rod; substantially horizontal adjustment means for said staking blade; a relatively movable upper power roll; a relatively movable tension roll; pivotally mounted arm members adapted to support said movable power and tension rolls; means for rotating said power rolls; means for rotating said spreader roll; and means for pivotally actuating said arm members.

3. In staking machine, the combination of a frame member; an upper relatively xed power roll; a spreader roll positioned substantially below said fixed power roll and mounted in adjustable oatng bearing blocks; astaking blade supported between said xed power roll and said spreader roll; substantially vertical adjustment means for said staking blade including a blade support bar, pivotal end supports for said bar, an adjustment bar rigidly attached to said pivotal end supports at one end and pinned to a threaded vertical adjustment rod at the other end, and an adjustment wheel threadedly attached to said vertical adjustment rod; substantially horizontal adjustment means for said staking blade including a threaded rod member lockably and rotatably attached to said blade support bar; a relatively movable upper power roll; a relatively movable tension roll; pvotally mounted arm members adapted to support said movable power and tension rolls; means for rotating said power rolls at a variable speed; means 'for rotating said spreader roll at a constant speed; and means for pivotally actuating said arm members.

JOHAN CF'. AMELUNXEN.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 2,054,443 Pierson Sept. 15, 1936 2,238,413 Doughty Apr. 15, 1941 2,297,189 Ladner et al. Sept. 29, 1942 

